281120087 has 4 divisors (see below), whose sum is σ = 284507160. Its totient is φ = 277733016.

The previous prime is 281120083. The next prime is 281120093. The reversal of 281120087 is 780021182.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 281120087 - 2² = 281120083 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281120083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1693412 + ... + 1693577.

It is an arithmetic number, because the mean of its divisors is an integer number (71126790).

Almost surely, 2^281120087 is an apocalyptic number.

281120087 is a deficient number, since it is larger than the sum of its proper divisors (3387073).

281120087 is an equidigital number, since it uses as much as digits as its factorization.

281120087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3387072.

The product of its (nonzero) digits is 1792, while the sum is 29.

The square root of 281120087 is about 16766.6361265461. The cubic root of 281120087 is about 655.0844534967.

The spelling of 281120087 in words is "two hundred eighty-one million, one hundred twenty thousand, eighty-seven".